package com.atguigu.gulimall.order.service.impl;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.exception.NoStockException;
import com.atguigu.common.to.SeckillOrderTo;
import com.atguigu.common.to.mq.OrderTo;
import com.atguigu.common.utils.R;
import com.atguigu.common.vo.MemberRespVo;
import com.atguigu.gulimall.order.constant.OrderConstant;
import com.atguigu.gulimall.order.dao.OrderItemDao;
import com.atguigu.gulimall.order.entity.OrderItemEntity;
import com.atguigu.gulimall.order.entity.PaymentInfoEntity;
import com.atguigu.gulimall.order.enume.OrderStatusEnum;
import com.atguigu.gulimall.order.feign.CartFeignService;
import com.atguigu.gulimall.order.feign.MemberFeignService;
import com.atguigu.gulimall.order.feign.ProductFeignService;
import com.atguigu.gulimall.order.feign.WmsFeignService;
import com.atguigu.gulimall.order.interceptor.LoginUserInterceptor;
import com.atguigu.gulimall.order.service.OrderItemService;
import com.atguigu.gulimall.order.service.PaymentInfoService;
import com.atguigu.gulimall.order.to.OrderCreateTo;
import com.atguigu.gulimall.order.vo.*;
import com.atguigu.gulimall.order.vo.alipay.PayAsyncVo;
import com.atguigu.gulimall.order.vo.alipay.PayVo;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import io.seata.spring.annotation.GlobalTransactional;
import org.springframework.amqp.AmqpException;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.aop.framework.AopContext;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.script.DefaultRedisScript;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.util.*;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.order.dao.OrderDao;
import com.atguigu.gulimall.order.entity.OrderEntity;
import com.atguigu.gulimall.order.service.OrderService;
import org.springframework.transaction.annotation.Isolation;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;


@Service("orderService")
public class OrderServiceImpl extends ServiceImpl<OrderDao, OrderEntity> implements OrderService {

    @Autowired
    MemberFeignService memberFeignService;

    @Autowired
    CartFeignService cartFeignService;

    @Autowired
    ThreadPoolExecutor executor;

    @Autowired
    WmsFeignService wmsFeignService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    ProductFeignService productFeignService;

    @Autowired
    OrderItemService orderItemService;

    @Autowired
    RabbitTemplate rabbitTemplate;

    @Autowired
    PaymentInfoService paymentInfoService;

    private ThreadLocal <OrderSubmitVo> confirmVoThreadLocal = new ThreadLocal<>();
    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<OrderEntity> page = this.page(
                new Query<OrderEntity>().getPage(params),
                new QueryWrapper<OrderEntity>()
        );

        return new PageUtils(page);
    }

    @Override
    public OrderConfirmVo confirmOrder() throws ExecutionException, InterruptedException {
        OrderConfirmVo confirmVo = new OrderConfirmVo();
        MemberRespVo memberRespVo = LoginUserInterceptor.loginUser.get();
        System.out.println("主线程。。。" + Thread.currentThread().getId());

        //此处解决因异步不同线程导致request为空，每次异步调度都设置一下即可
        //获取之前的请求
        RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();

        CompletableFuture<Void> getAddressFutureTask = CompletableFuture.runAsync(() -> {
            System.out.println("member。。。" + Thread.currentThread().getId());
            //每一个线程都来共享之前的请求数据
            RequestContextHolder.setRequestAttributes(requestAttributes);
            //1、远程查询所有的收货地址列表
            List<MemberAddressVo> address = memberFeignService.getAddress(memberRespVo.getId());
            confirmVo.setAddress(address);
        }, executor);


        CompletableFuture<Void> cartFutureTask = CompletableFuture.runAsync(() -> {
            System.out.println("cart。。。" + Thread.currentThread().getId());
            //每一个线程都来共享之前的请求数据
            RequestContextHolder.setRequestAttributes(requestAttributes);
            //2、远程查询购物车所有选中的购物项
            List<OrderItemVo> items = cartFeignService.getCurrentUserCartItems();
            confirmVo.setItems(items);
            //feign在远程调用之前要构造请求，调用很多拦截器
            //RequestInterceptor interceptor : requestInterceptors
        }, executor).thenRunAsync(() -> {
            List<OrderItemVo> items = confirmVo.getItems();
            List<Long> collect = items.stream().map(item -> item.getSkuId()).collect(Collectors.toList());
            R hasStock = wmsFeignService.getSkusHasStock(collect);
            List<SkuStockVo> data = hasStock.getData(new TypeReference<List<SkuStockVo>>() {
            });
            if (data != null) {
                Map<Long, Boolean> map = data.stream().collect(Collectors.toMap(SkuStockVo::getSkuId, SkuStockVo::getHasStock));
                confirmVo.setStocks(map);
            }
        }, executor);


        //3、查询用户积分
        Integer integration = memberRespVo.getIntegration();
        confirmVo.setIntegration(integration);

        //4、其他数据自动计算


        //TODO 5、防重令牌
        String token = UUID.randomUUID().toString().replace("-", "");
        redisTemplate.opsForValue().set(OrderConstant.USER_ORDER_TOKEN_PREFIX + memberRespVo.getId(), token, 30, TimeUnit.MINUTES);
        confirmVo.setOrderToken(token);
        CompletableFuture.allOf(getAddressFutureTask, cartFutureTask).get();

        return confirmVo;
    }

    /**
     * 本地事务模拟
     */
    @Transactional(timeout = 30)//a事务的所有设置就传播到了和他共用一个事务的方法里
    public void a(){
        //b,c做任何设置都没用，都是和a共用一个事务 ， 事务使用代理对象来控制的 ， 同一个对象内事务方法互调默认失效，原因：绕过了代理对象
        //如果本类中执行this.b();或者b();这种是事务无效的都跟啊一样，因为实际没产生代理对象，如果是bService.b();这种形式生成事务
//        b();  没用  // 自己跟a是一个事务的，全都跟着a的事务执行
//        c();  没用  //新事务（不回滚）

        OrderServiceImpl orderService = (OrderServiceImpl) AopContext.currentProxy();
        orderService.b(); //本地调用生效
        orderService.c(); //本地调用事务生效

        int i = 10/0;
    }
    @Transactional(propagation = Propagation.REQUIRED,timeout = 2)
    public void b(){

    }
    @Transactional(propagation = Propagation.REQUIRES_NEW,timeout = 20)
    public void c(){

    }

    //本地事务，在分布式系统下，只能控制住自己的回滚，控制不了其他服务的回滚
    //分布式事务：最大原因。网络问题 + 分布式机器
    //mysql默认隔离级别(isolation = Isolation.REPEATABLE_READ) 可重复读
    //(propagation = Propagation.REQUIRED)
    @Transactional
//    @GlobalTransactional //高并发不太适合这个seata，加锁都给变成串行化了，就不好。这里高并发推荐使用可靠消息+最终一致性
    @Override
    public SubmitOrderResponseVo submitOrder(OrderSubmitVo vo) {
        SubmitOrderResponseVo response = new SubmitOrderResponseVo();

        MemberRespVo memberRespVo = LoginUserInterceptor.loginUser.get();
        confirmVoThreadLocal.set(vo);
        response.setCode(0);
        //1、验证令牌：[核心：令牌的对比和删除必须保证原子性，防止用户第一次点击满第二次快同时执行到这里]
        //lua脚本：get的值和传来的值相等返回删除令牌，否则返回0
        //脚本最终返回0或1,0总是代表失败，1删除成功
        String script = "if redis.call('get',KEYS[1]) == ARGV[1] then return redis.call('del',KEYS[1]) else return 0 end";
        String orderToken = vo.getOrderToken();
        //原子验证令牌和删除令牌
        Long result = redisTemplate.execute(new DefaultRedisScript<Long>(script, Long.class), Arrays.asList(OrderConstant.USER_ORDER_TOKEN_PREFIX + memberRespVo.getId()), orderToken);
        if(result == 0L){
            //令牌验证失败
            return response;
        }else{
            //令牌验证成功
            //下单：去创建订单，验令牌、验价格，锁库存...
            //1、创建订单，订单项等信息
            OrderCreateTo order = createOrder();
            //2、验价
            BigDecimal payAmount = order.getOrder().getPayAmount();
            BigDecimal payPrice = vo.getPayPrice();
            if(Math.abs(payAmount.subtract(payPrice).doubleValue())<0.01){
                //金额对比
                //。。。。
                //TODO 3、保存订单
                saveOrder(order);
                //4、库存锁定。只要有异常回滚订单数据。
                //订单号，所有订单项（skuId,skuName,num）
                WareSkuLockVo lockVo = new WareSkuLockVo();
                lockVo.setOrderSn(order.getOrder().getOrderSn());

                List<OrderItemVo> locks = order.getOrderItems().stream().map(item -> {
                    OrderItemVo itemVo = new OrderItemVo();
                    itemVo.setSkuId(item.getSkuId());
                    itemVo.setCount(item.getSkuQuantity());
                    itemVo.setTitle(item.getSkuName());
                    return itemVo;
                }).collect(Collectors.toList());
                lockVo.setLocks(locks);
                //TODO 4、远程锁库存
                //库存成功了，但是网络原因超时了，订单回滚，库存不滚。
                //为了保证高并发。库存服务自己回滚。可以发消息给库存服务
                //库存服务本身也可以使用自动解锁模式  使用消息队列完成这个事
                R r = wmsFeignService.orderLockStock(lockVo);
                System.out.println("远程锁库存："+r.getCode());
                if(r.getCode() == 0){
                    //锁成功了
                    response.setOrder(order.getOrder());

                    //TODO 5、远程扣减积分
//                    int i = 10/0;//订单回滚，库存不滚
                    //TODO 订单创建成功，发送消息给MQ
                    rabbitTemplate.convertAndSend("order-event-exchange","order.create.order",order.getOrder());
                    return response;
                }else{
                    //锁定失败了
                    String msg = (String) r.get("msg");
                    throw new NoStockException(msg);
//                    response.setCode(3);
//                    return response;
                }
            }else{
                response.setCode(2);
                return response;
            }
        }

//        String redisToken = redisTemplate.opsForValue().get(OrderConstant.USER_ORDER_TOKEN_PREFIX + memberRespVo.getId());
//        if (orderToken != null && orderToken.equals(redisToken)) {
//            //令牌验证通过
//            redisTemplate.delete(OrderConstant.USER_ORDER_TOKEN_PREFIX + memberRespVo.getId())
//        } else {
//        }
    }

    @Override
    public OrderEntity getOrderStatusByOrderSn(String orderSn) {
        return this.getOne(new QueryWrapper<OrderEntity>().eq("order_sn", orderSn));
    }

    @Override
    public void closeOrder(OrderEntity entity) {
        //查询当前这个订单的最新状态
        OrderEntity orderEntity = this.getById(entity.getId());
        if(orderEntity.getStatus() == OrderStatusEnum.CREATE_NEW.getCode()){
            //关单
            OrderEntity update = new OrderEntity();
            update.setId(entity.getId());
            update.setStatus(OrderStatusEnum.CANCLED.getCode());
            this.updateById(update);

            OrderTo orderTo = new OrderTo();
            BeanUtils.copyProperties(orderEntity,orderTo);

            //发给MQ一个
            try {
                //TODO 保证消息一定会发出去,每一个消息都可以做好日志记录（给数据库保存每一个消息的详细信息）
                //TODO 定期扫描数据库将失败的消息再发送一次
                rabbitTemplate.convertAndSend("order-event-exchange","order.release.other",orderTo);
            } catch (AmqpException e) {
                //TODO 将没发送成功的消息进行重试发送

            }
        }

    }

    @Override
    public PayVo getOrderPay(String orderSn) {
        PayVo payVo = new PayVo();
        /**
         *   payVo.setBody();//订单备注
         *         payVo.setOut_trade_no();//订单号
         *         payVo.setSubject();//订单的主体
         *         payVo.setTotal_amount();//订单的金额
         * */
        OrderEntity order = this.getOrderStatusByOrderSn(orderSn);
        payVo.setTotal_amount(order.getPayAmount().setScale(2,BigDecimal.ROUND_UP).toString());//数据库存的小数点后4位，这里处理成小数点后保存2位，如果不是0就往上进位
        payVo.setOut_trade_no(order.getOrderSn());

        List<OrderItemEntity> order_sn = orderItemService.list(new QueryWrapper<OrderItemEntity>().eq("order_sn", orderSn));
        OrderItemEntity entity = order_sn.get(0);

        payVo.setSubject(entity.getSkuName());
        payVo.setBody(entity.getSkuAttrsVals());
        return payVo;
    }

    @Override
    public PageUtils queryPageWithItem(Map<String, Object> params) {
        MemberRespVo memberRespVo = LoginUserInterceptor.loginUser.get();
        IPage<OrderEntity> page = this.page(
                new Query<OrderEntity>().getPage(params),
                new QueryWrapper<OrderEntity>().eq("member_id",memberRespVo.getId()).orderByDesc("id")
        );

        List<OrderEntity> order_sn = page.getRecords().stream().map(order -> {
            List<OrderItemEntity> itemEntities = orderItemService.list(new QueryWrapper<OrderItemEntity>().eq("order_sn", order.getOrderSn()));
            order.setItemEntities(itemEntities);
            return order;
        }).collect(Collectors.toList());

        page.setRecords(order_sn);
        return new PageUtils(page);
    }

    /**
     * 处理支付宝的支付结果
     * @param vo
     * @return
     */
    @Override
    public String handlePayResult(PayAsyncVo vo) {
        //1、保存交易流水
        PaymentInfoEntity infoEntity = new PaymentInfoEntity();
        infoEntity.setAlipayTradeNo(vo.getTrade_no());
        infoEntity.setOrderSn(vo.getOut_trade_no());
        infoEntity.setPaymentStatus(vo.getTrade_status());
        infoEntity.setCallbackTime(vo.getNotify_time());

        paymentInfoService.save(infoEntity);

        //2、修改订单的状态信息
        if(vo.getTrade_status().equals("TRADE_SUCCESS") || vo.getTrade_status().equals("TRADE_FINISHED")){
            //支付成功状态
            String outTradeNo = vo.getOut_trade_no();
            this.baseMapper.updateOrderStatus(outTradeNo,OrderStatusEnum.PAYED.getCode());

        }
        return "success";
    }

    @Override
    public void createSeckillOrder(SeckillOrderTo seckillOrderTo) {
        //TODO 保存订单信息
        OrderEntity orderEntity = new OrderEntity();
        orderEntity.setOrderSn(seckillOrderTo.getOrderSn());
        orderEntity.setMemberId(seckillOrderTo.getMemberId());

        orderEntity.setStatus(OrderStatusEnum.CREATE_NEW.getCode());
        BigDecimal multiply = seckillOrderTo.getSeckillPrice().multiply(new BigDecimal("" + seckillOrderTo.getNum()));

        orderEntity.setPayAmount(multiply);
        this.save(orderEntity);
        //TODO 保存订单项信息
        OrderItemEntity orderItemEntity = new OrderItemEntity();
        orderItemEntity.setOrderSn(seckillOrderTo.getOrderSn());
        orderItemEntity.setRealAmount(multiply);
        orderItemEntity.setSkuQuantity(seckillOrderTo.getNum());
        //TODO 获取当前SKU的详细信息进行设置
        orderItemService.save(orderItemEntity);

    }


    /**
     * 保存订单的所有数据
     * @param order
     */
    private void saveOrder(OrderCreateTo order) {
        OrderEntity orderEntity = order.getOrder();
        orderEntity.setModifyTime(new Date());
        this.save(orderEntity);

        List<OrderItemEntity> orderItems = order.getOrderItems();
        orderItemService.saveBatch(orderItems);

    }

    private OrderCreateTo createOrder(){
        OrderCreateTo orderCreateTo = new OrderCreateTo();
        //1、生成订单号
        String orderSn = IdWorker.getTimeId();
        //创建订单号
        OrderEntity orderEntity = buildOrder(orderSn);

        //2、获取到所有的订单项
        List<OrderItemEntity> orderItemEntities = buildOrderItems(orderSn);

        //3、验价:计算价格、积分相关信息
        computePrice(orderEntity,orderItemEntities);
        orderCreateTo.setOrder(orderEntity);
        orderCreateTo.setOrderItems(orderItemEntities);
        return orderCreateTo;
    }

    /**
     * 计算价格相关
     * @param orderEntity
     * @param orderItemEntities
     */
    private void computePrice(OrderEntity orderEntity, List<OrderItemEntity> orderItemEntities) {
        BigDecimal total = new BigDecimal("0.0");

        BigDecimal coupon = new BigDecimal("0.0");
        BigDecimal integration = new BigDecimal("0.0");
        BigDecimal promotion = new BigDecimal("0.0");

        BigDecimal gift = new BigDecimal("0.0");
        BigDecimal growth = new BigDecimal("0.0");
        //订单的总额，叠加每一个订单项的总额信息
        for (OrderItemEntity entity : orderItemEntities) {
            coupon = coupon.add(entity.getCouponAmount());
            integration = integration.add(entity.getIntegrationAmount());
            promotion = promotion.add(entity.getPromotionAmount());
            total = total.add(entity.getRealAmount());
            gift = gift.add(new BigDecimal(entity.getGiftIntegration().toString()));
            growth = growth.add(new BigDecimal(entity.getGiftGrowth().toString()));
        }
        //1、订单价格相关
        orderEntity.setTotalAmount(total);
        //设置应付总额
        orderEntity.setPayAmount(total.add(orderEntity.getFreightAmount()));
        orderEntity.setPromotionAmount(promotion);
        orderEntity.setIntegrationAmount(integration);
        orderEntity.setCouponAmount(coupon);

        //设置积分
        orderEntity.setIntegration(gift.intValue());
        orderEntity.setGrowth(growth.intValue());
        orderEntity.setDeleteStatus(0);//未删除
    }

    /**
     * 设置订单信息
     * @param orderSn
     */
    private OrderEntity buildOrder(String orderSn) {
        MemberRespVo memberRespVo = LoginUserInterceptor.loginUser.get();
        OrderEntity orderEntity = new OrderEntity();
        orderEntity.setOrderSn(orderSn);
        orderEntity.setMemberId(memberRespVo.getId());

        OrderSubmitVo orderSubmitVo = confirmVoThreadLocal.get();
        //获取收货地址信息
        R fare = wmsFeignService.getFare(orderSubmitVo.getAddrId());
        FareVo fareResp = fare.getData(new TypeReference<FareVo>() {
        });
        //设置运费信息
        orderEntity.setFreightAmount(fareResp.getFare());
        //设置收货人信息
        orderEntity.setReceiverCity(fareResp.getAddress().getCity());
        orderEntity.setReceiverDetailAddress(fareResp.getAddress().getDetailAddress());
        orderEntity.setReceiverName(fareResp.getAddress().getName());
        orderEntity.setReceiverPhone(fareResp.getAddress().getPhone());
        orderEntity.setReceiverPostCode(fareResp.getAddress().getPostCode());
        orderEntity.setReceiverProvince(fareResp.getAddress().getProvince());
        orderEntity.setReceiverRegion(fareResp.getAddress().getRegion());

        //设置订单的相关状态信息
        orderEntity.setStatus(OrderStatusEnum.CREATE_NEW.getCode());
        orderEntity.setAutoConfirmDay(7);

        return orderEntity;
    }

    /**
     * 构建所有订单项数据
     * @return
     */
    private List<OrderItemEntity> buildOrderItems(String orderSn) {
        //最后确定每个购物项的价格
        List<OrderItemVo> items = cartFeignService.getCurrentUserCartItems();
        if(items!=null && items.size()>0){
            List<OrderItemEntity> itemEntities = items.stream().map(cartItem -> {
                OrderItemEntity itemEntity = buildOrderItem(cartItem);
                itemEntity.setOrderSn(orderSn);
//                itemEntity.setIntegrationAmount();
                return itemEntity;
            }).collect(Collectors.toList());
            return itemEntities;
        }

        return null;
    }

    /**
     * 构建某一个订单项
     * @param cartItem
     * @return
     */
    private OrderItemEntity buildOrderItem(OrderItemVo cartItem) {
        OrderItemEntity itemEntity = new OrderItemEntity();
        //1、订单信息：订单号
        //2、商品的spu信息
        Long skuId = cartItem.getSkuId();
        R r = productFeignService.getSpuInfoBySkuId(skuId);
        SpuInfoVo data = r.getData(new TypeReference<SpuInfoVo>() {
        });
        itemEntity.setSpuId(data.getId());
        itemEntity.setSpuBrand(data.getBrandId().toString());
        itemEntity.setSpuName(data.getSpuName());
        itemEntity.setCategoryId(data.getCatalogId());

        //3、商品的sku信息
        itemEntity.setSkuId(cartItem.getSkuId());
        itemEntity.setSkuName(cartItem.getTitle());
        itemEntity.setSkuPic(cartItem.getImage());
        itemEntity.setSkuPrice(cartItem.getPrice());
        String skuAttr = StringUtils.collectionToDelimitedString(cartItem.getSkuAttr(), ";");
        itemEntity.setSkuAttrsVals(skuAttr);
        itemEntity.setSkuQuantity(cartItem.getCount());
        //4、优惠信息【忽略不做】
        //5、积分信息
        itemEntity.setGiftGrowth(cartItem.getPrice().multiply(new BigDecimal(cartItem.getCount().toString())).intValue());
        itemEntity.setGiftIntegration(cartItem.getPrice().multiply(new BigDecimal(cartItem.getCount().toString())).intValue());
        //6、订单项的价格信息
        itemEntity.setPromotionAmount(new BigDecimal("0"));
        itemEntity.setCouponAmount(new BigDecimal("0"));
        itemEntity.setIntegrationAmount(new BigDecimal("0"));
        //当前订单项的实际金额 。 总额-各种优惠
        BigDecimal origin = itemEntity.getSkuPrice().multiply(new BigDecimal(itemEntity.getSkuQuantity().toString()));
        BigDecimal subtract = origin
                .subtract(itemEntity.getCouponAmount())
                .subtract(itemEntity.getPromotionAmount())
                .subtract(itemEntity.getIntegrationAmount());
        itemEntity.setRealAmount(subtract);
        return itemEntity;
    }


}